Electrical connecting-cord



(No Model.)

0. H. MGEVOY.

ELECTRICAL CONNECTING GORD.

No. 573,612. Patented Dec. 22, 1896.

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UNITED STATES PAT NT OFFICE.

CHARLES H. MCEVOY, OF LOlVELL, MASSACHUSETTS.

ELECTRICAL CON NECTING-CORD.

SPECIFICATION forming part of Letters Patent No. 57 3,612, dated December 22, 1896.

Application filed February 24, 1896. Serial No. 580,357. (No model.)

To all 1 071,071 it rib/Ly concern:

Be it known that 1, CHARLES H. MoEvov, a citizen of the United States, residing at Lowell, in the count-y of Middlesex and Commonwealth of Massachusetts, have invented a certain new and useful Improvement in Electrical Connecting-Cords, of which the following is a specification.

My invention relates to electrical connectin g-cords; and it consists in the devices and combinations hereinafter described and claimed. Such electrical connecting-cords commonly consist of one or more (usually two or more) cores of tinsel-covered thread, each core being separately covered by a flexible braided covering, and the core or cores, together with a comparatively inextensible supporting-cord, being inclosed (except at their ends, which project from said common covering) in a common braided covering. Sometimes a helical spring is used for a core instead of the tinsel-covered threads.

The ends of the cores are secured, as by soldering, to tips of wire adapted to be secured in binding-posts in a well known manner, and the ends of the supporting-cord are intended to be tied about a binding-post, or to some other thing which is stationary with respect to such post, in such a manner as to keep the conducting-cores slack and to prevent said cores being broken or separated from their tips; but the duty of properly attaching the supporting-cord is frequently so carelessly performed as to leave the part of said supporting-cord between its points of attachment longer than the cores, or said supporting-cord is carelessly tied and becomes accidentally untied or slips off. The most common use of these conductors is to connect the receiver of a telephone to binding-posts of the magneto-electric call-box, one end of the supporting-cord being usually tied into a screw-eye secured in said receiver. \Vhen the supporting-cord is slack, the continual bending of the conducting-cores by the moving about of the operator and the pulling of the connecting-cord is liable to break the cores away from the tips, and d ropping said receiver is almost certain to. separate said cores and tips. I avoid all danger of such separation by providing means of attaching the supporting-cord at each end thereof directly to a tip, so that the act of inserting the tip in the binding-post attaches the supporting-cord.

In the accompanying drawings, Figure l is a front elevation of 'a part of a telephonebackboard with magneto-electric call-box, receiver, and connecting-cord provided with my improvement; Fig. 2, .a side elevation of a covered core, a tip and its shell, partly in section to show a way of attaching the tipwire to the core, and the link for the attachment of the supporting-cord; Fig. 3, a front elevation of said tip-wire, its shell, the link, and a covered core; Fig. 4, a side elevation of the parts shown in Fig. 3, the link being at; tached to the shell part of the tip instead of to the tip-wire, as in Figs; 1 and 2; Fig. 5, a plan of a wire link with supporting-cord attached; Fig. 6, a plan of a sheet-metal link; Fig. 7, a plan of a wire link in which the eyes lie in difl'erent planes.

The backboard A, magneto-electric callbox B, hand -telephone or receiver 0, and binding-posts b c are all of any usual construction and operation.

The connecting-cord D, comprising covered cores cl and a supporting-cord d and common covering (1 is of substantially the common construction, except as hereinafter stated.

The tip F, which may be connected to the conducting-core d in any usual manner, is represented in Fig. 2 as having a tapering end f arranged within the core d and projecting outwardly through the wall of the core and its covering, and hooked at f on the outside of said core-covering, and as having a shell f which surrounds the end of said core and covering, all substantially as shown and described in United States Patent No. 536,153, granted to me March 19, 1895.

I use a link or loop E, preferably a link of wire, as shown in Figs. 2 to 5, with two eyes 6 9, one, 8, of which is placed over the tip-Wire F against the shell f and preferably soldered thereto, and the other, e, of which eyes receives an end of the supporting-cord d, which is knotted or tied outside of said eye at d to prevent said end from being drawn out of said eye, Fig. 5, or the eye 6 may surround 'the shell f part of the tip being laid in an annular groove f in said shell, as shown in Fig. 4.

The eyes 6 e of the wire link may lie in the same plane, as shown in Fig. 5, or in planes at right angles with each other, as shown in Fig. 7.

A modified form E of said link is shown in Fig. (3, the same being punched out of sheet metal and having eyes 6 e punched therein.

I claim as my invention- 1. A flexible electric conductor, comprising a conducting-core, a conducting-tip in electrical connection with said core, a non-conducting supporting-cord and a link arranged to surround said tip and to receive said snpporting-cord.

2. A flexible electric conductor, comprisin a conducting-core, a conducting-tip havinga pin in electrical connection with said core and having a shell, a non-conducting supportingcord and a link, arranged to surround the pin of said tip and to receive said supporting-cord. 3. A flexible electric conductor, comprislng a conducting-core, a conducting-tip in elec- In witness whereof I have signed this specification, in the presence of two attesting witnesses, this 15th day of February, A. D. 1896.

CHARLES II. MCEVOY. 'itnesses ALBERT M. MOORE, GRACE E. I-IIBBERT. 

